BCSDN-IoT: Towards an IoT security architecture based on SDN and Blockchain

The Internet of Things (IoT) aims to create a digital world where any information system can expose, discover, understand and consume data and services for analysis, diagnosis, decision support and task automation in various domains such as healthcare, transportation, energy, industry, agriculture, etc. Faced with this diversity of applications and rapid evolution, infrastructures must be able to achieve high levels of security and confidentiality while being open, sustainable, and agile to adapt to the multiple requirements of applications. To meet these needs, new paradigms are emerging. These include the Software Defined Networks (SDN) paradigm, which offers the ability to dynamically program different applications and devices to provide end-to-end service chains. In parallel, the Blockchain paradigm is increasingly used in the Internet of Things, making distributed transactions between connected objects such as financial transactions or "smart contracts" possible. Although the combination of these two paradigms (Blockchain/SDN) is a major issue for the success of the Internet of Things, paving the way for new business models and management/control of communication networks, there is not yet a specified/formalized architecture allowing the use of the "Blockchain" in SDN. In this research, a new architecture for a system combining blockchain and SDN for IoT security is proposed